Detection and Characterization of Exoplanets using Projections on Karhunen-Loeve Eigenimages: Forward Modeling

Abstract

A new class of high-contrast image analysis algorithms that empirically fit and subtract systematic noise has lead to recent discoveries of faint exoplanet /substellar companions and scattered light images of circumstellar disks. These methods are extremely efficient at enhancing the detectability of faint astrophysical signal, but they do generally create systematic biases in their observed properties. This paper provides a general solution for this outstanding problem. We present the analytical derivation of a linear expansion that captures the impact of astrophysical over-subtraction and/or self-subtraction these image analysis techniques. We examine the general case for which the reference images of the astrophysical scene move azimuthally and/or radially across the field of view as a result of the observation strategy. Our new method is based on perturbing the covariance matrix underlying any least-squares speckles problem, and propagating this perturbation through the data analysis algorithm. We then demonstrate practical applications of this new algorithm. We first consider the case of the spectral extraction of faint point sources in IFS data and illustrate, using public Gemini Planet Imager commissioning data, that our novel perturbation-based Karhunen-Loève Image Processing Forward Modeling (KLIP-FM) can indeed alleviate algorithmic biases. We then apply KLIP-FM to the problem associated with the detection of point sources. We show how it decreases the rate of false negatives (e.g missed planets) while keeping the rate of false positives unchanged when compared to classical least-squares fitting methods. This can potentially have important consequences on the design of follow-up strategies of ongoing direct imaging surveys.

References in corpus (36)

• Angular Differential Imaging: a Powerful High-Contrast Imaging Technique
• Images of a fourth planet orbiting HR 8799
• Detection and Characterization of Exoplanets and Disks using Projections on Karhunen-Loeve Eigenimages
• The Gemini Planet Imager: First Light
• A new algorithm for point spread function subtraction in high-contrast imaging: a demonstration with angular differential imaging
• Fundamental limitations of high contrast imaging set by small sample statistics
• PynPoint: An Image Processing Package for Finding Exoplanets
• Imaging Spectroscopy for Extrasolar Planet Detection
• Uniform Atmospheric Retrieval Analysis of Ultracool Dwarfs I: Characterizing Benchmarks, Gl570D and HD3651B
• The International Deep Planet Survey I. The frequency of wide-orbit massive planets around A-stars
• Fast computation of Lyot-style coronagraph propagation
• A Statistical Analysis of SEEDS and Other High-Contrast Exoplanet Surveys: Massive Planets or Low-Mass Brown Dwarfs?
• The Gemini NICI Planet-Finding Campaign: The Frequency of Giant Planets around Young B and A Stars
• A New High Contrast Imaging Program at Palomar Observatory
• Reconnaissance of the HR 8799 Exosolar System I: Near IR Spectroscopy
• Direct exoplanet detection and characterization using the ANDROMEDA method: Performance on VLT/NaCo data
• Speckle noise and dynamic range in coronagraphic images
• Reconnaissance of the HR 8799 Exosolar System II: Astrometry and Orbital Motion
• Gemini Planet Imager Spectroscopy of the HR 8799 planets c and d
• Magellan Adaptive Optics first-light observations of the exoplanet beta Pic b. II. 3-5 micron direct imaging with MagAO+Clio, and the empirical bolometric luminosity of a self-luminous giant planet
• Confidence Level and Sensitivity Limits in High Contrast Imaging
• Application of a damped Locally Optimized Combination of Images method to the spectral characterization of faint companions using an Integral Field Spectrograph
• The First H-band Spectrum of the Massive Gas Giant Planet beta Pictoris b with the Gemini Planet Imager
• The Kappa Andromedae System: New Constraints on the Companion Mass, System Age & Further Multiplicity
• Five Debris Disks Newly Revealed in Scattered Light from the HST NICMOS Archive
• Physical and orbital properties of Beta Pictoris b
• New Techniques for High-Contrast Imaging with ADI: the ACORNS-ADI SEEDS Data Reduction Pipeline
• Direct Detection and Orbit Analysis of the Exoplanets HR 8799 bcd from Archival 2005 Keck/NIRC2 Data
• GPI PSF subtraction with TLOCI: the next evolution in exoplanet/disk high-contrast imaging
• Improving Signal to Noise in the Direct Imaging of Exoplanets and Circumstellar Disks
• Linear and Bayesian Planet Detection Algorithms for the Terrestrial Planet Finder
• Is the HD 15115 inner disk really asymmetrical ?
• Archival Legacy Investigations of Circumstellar Environments: Overview and First Results
• Direct Spectrum of the Benchmark T dwarf HD 19467 B
• S4: A Spatial-Spectral model for Speckle Suppression
• Simultaneous exoplanet detection and instrument aberration retrieval in multispectral coronagraphic imaging

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• Combining reference-star and angular differential imaging for high-contrast imaging of extended sources
• Use the 4S (Signal-Safe Speckle Subtraction): Explainable Machine Learning reveals the Giant Exoplanet AF Lep b in High-Contrast Imaging Data from 2011
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• Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of $\alpha$ Cen A. II. Binary Star Modeling, Planet and Exozodi Search, and Sensitivity Analysis
• HST survey of the Orion Nebula Cluster in the H${}_2$O 1.4 $\mu$m absorption band: III. The population of sub-stellar binary companions
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